problem with ds18s20

[pete]

I try to use <a href="http://www.phanderson.com/PIC/PICC/CCS_PCM/ds1820.html" TARGET="_blank">http://www.phanderson.com/PIC/PICC/CCS_PCM/ds1820.html</a> code with ds18s20. I don't have oscilloscope so I can see nothing else than my lcd result. I can't get it work. Have someone more information to use ds18s20? I have 4,4Kohm pull-up resistor,using ds18s20 with paraside mode.

Pete
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This message was ported from CCS's old forum
Original Post ID: 12156

[Neutone]

:=I try to use <a href="http://www.phanderson.com/PIC/PICC/CCS_PCM/ds1820.html" TARGET="_blank"> <a href="http://www.phanderson.com/PIC/PICC/CCS_PCM/ds1820.html" TARGET="_blank">http://www.phanderson.com/PIC/PICC/CCS_PCM/ds1820.html</a></a> code with ds18s20. I don't have oscilloscope so I can see nothing else than my lcd result. I can't get it work. Have someone more information to use ds18s20? I have 4,4Kohm pull-up resistor,using ds18s20 with paraside mode.
:=
:=Pete

Search this forum and you can find a lot of information. I have see functions posted in this forum that support all the functionality of the ds1820. I have posted some myself with minimal support for the ds1820.
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This message was ported from CCS's old forum
Original Post ID: 12169

[pete]

I try to search but found nothing than phanderson code.
I just hope someone has more details, it helps me a lot.Usually I use LM335 temperature sensor, i-wire was new for me.
Thanks.
Pete
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This message was ported from CCS's old forum
Original Post ID: 12174

[PCM programmer]

<font face="Courier New" size=-1>:=I try to search but found nothing than phanderson code.
:=I just hope someone has more details, it helps me a lot.Usually I use LM335 temperature sensor, i-wire was new for me.
--------------------------------------------------

Peter Anderson has some delay functions which are intended
for a 16-series PIC running at 4 MHz. If you are running
at a higher crystal frequency, and you're still using that
same code, then there could easily be a problem.

If so, then replace his delay functions with CCS delay
functions. Replace delay_10_us(n) with delay_us(n * 10).
(Do the n * 10 math yourself. Put in the actual value).
Delete his "delay_ms()" function, to be sure that the
CCS built-in delay_ms() function is used.

Maxim has an appnote that has C source code for 1-wire chips.
You could port this code to CCS.
<a href="http://pdfserv.maxim-ic.com/arpdf/AppNotes/app126.pdf" TARGET="_blank"> <a href="http://pdfserv.maxim-ic.com/arpdf/AppNotes/app126.pdf" TARGET="_blank">http://pdfserv.maxim-ic.com/arpdf/AppNotes/app126.pdf</a></a>

Here's another appnote that may be better than that one.
This one is specifically about the DS18x20 series chips,
with C source code. (Has to be ported to CCS).
<a href="http://pdfserv.maxim-ic.com/arpdf/AppNotes/app162.pdf" TARGET="_blank">http://pdfserv.maxim-ic.com/arpdf/AppNotes/app162.pdf</a>

Here's a page full of appnotes on the DS18S20.
(scroll down to the bottom of this page.)
<a href="http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2815" TARGET="_blank">http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2815</a>





--</font>
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This message was ported from CCS's old forum
Original Post ID: 12189

[none]

pete,

look below for some sample onewire routines, should
help you get started. you'll need to add support for
parasite mode, however.

<a href="http://losdos.dyndns.org:8080/public/onewire/" TARGET="_blank">http://losdos.dyndns.org:8080/public/onewire/</a>

regards



:=I try to search but found nothing than phanderson code.
:=I just hope someone has more details, it helps me a lot.Usually I use LM335 temperature sensor, i-wire was new for me.
:=Thanks.
:=Pete
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This message was ported from CCS's old forum
Original Post ID: 12224